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PostgreSQL 19 beta arrives with four operational game-changers: 64-bit MultiXact Members kill a decades-old "vacuum or die" failure mode, parallel autovacuum…

This article compares CloudNativePG and Crunchy PGO, two of the most adopted open-source operators for running PostgreSQL on Kubernetes. It covers architecture, image design, backup strategy, major version upgrades, observability, licensing and community health. As a co-founder and maintainer of CloudNativePG, I make no claim to neutrality, and I say so upfront. What I can offer is informed bias, grounded in years of daily work on the project and a genuine respect for what Crunchy Data built in this space.

Introduction

If you’ve been running PostgreSQL for any length of time, you’ve probably heard about transaction ID (XID) wraparound. It’s one of the most well-known maintenance concerns in Postgres, and there’s no shortage of blog posts, conference talks, and war stories about it. But there’s a quieter, less-discussed cousin that can cause the exact same kind of outage: MultiXact ID wraparound.

A parameter you cannot change. block_size lives in the “Preset Options” section of the docs, alongside its read-only cousins like data_checksums, wal_block_size, and server_version. It reports the size of a PostgreSQL page — the fundamental unit of on-disk storage and buffer-pool accounting. Defa…

These two parameters close out the bgwriter cluster. Together with bgwriter_delay, they govern how the background writer decides what to write each round, and they are where the actual leverage lives — the previous post ended by saying so explicitly. Here is why. The bgwriter’s algorithm, in one …

The B cluster shifts gears: from one-off oddities to the background writer parameters, which span four GUCs. We do the first two as a pair because bgwriter_delay introduces the process at all, and bgwriter_flush_after slots cleanly into the writeback tour from backend_flush_after. What the backgr…

Two remote code execution bugs lived in pgcrypto for twenty years until an AI fuzzer found them in a weekend. Here's what you need to know.

Debug PostgreSQL errors by capturing C-level stack traces for specific internal functions.

SQL is fun and not at all boring. The latest article by Markus Winand on Order by Has Come a Long Way sent me on quite a journey.

First, set up a table called nums with one integer column and four rows:

CREATE TABLE nums (a int); INSERT INTO nums VALUES (0), (1), (2), (3);

Try to guess what these two queries return.

PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are out as of May 14, 2026. The release fixes eleven security issues and more than sixty bugs. That is not a typo. Eleven CVEs is the largest single-release security batch I can remember, and three of them are CVSS 8.8 with practical exploitation pa…

PostgreSQL 19 brings back MERGE PARTITIONS and SPLIT PARTITION—but simpler and safer than the first attempt.

Yesterday, we had our first meetup at our new venue, which we hope will become our permanent home: the Chicago Innovations Center at 1 W. Monroe. We had the pleasure of having Elizabeth Christensen from Snowflake, who delivered a talk pg_lake: Unifying transactional and analytical data with Postgres.

I find the topic exceptionally valuable, and I was delighted when Elizabeth suggested it. Below are some photos and a presentation recording.

Many thanks to:

A 2006 SQL injection vulnerability and multibyte character encodings created `backslash_quote`, a GUC parameter that remains in PostgreSQL for backward…

It's that time again. The upcoming Postgres v18.4 release (along with minor releases for all Major versions) has dropped some serious hints in the git logs, and it's bringing a significant payload of CVE tagged patches. As a seasoned Postgres end-user and an erstwhile DBA, whenever I see a flurry of high-vulnerability security commits, I immediately start recommending that customers begin planning their patching cycles.

A heap buffer overflow in pgcrypto's OpenPGP code lurked for two decades—until a December 2025 exploit made it real.

I'm excited to announce release 1.0 of pg_statviz, the minimalist extension and utility pair for time series analysis and visualization of PostgreSQL internal statistics.

A step-by-step guide to migrating a PostgreSQL 17 cluster managed by Crunchy PGO v6 to PostgreSQL 18 under CloudNativePG. Two paths are covered: a fully declarative offline migration using CloudNativePG’s built-in pg_dump import, and an online migration using native PostgreSQL logical replication for a near-zero-downtime cutover.

PGConf Belgium took place on 5 May 2026, organized by Wim Bertels, An Vercammen, and Grégory Gioffredi , who served also at the talk selection team.

Speaker:

PostgreSQL's complicated relationship with the Linux page cache spawns four GUCs to manage writeback—and backend_flush_after is the conservative one.

#​648 — May 13, 2026

Web Version

Postgres Weekly

Strong Views on Postgres VIEWs — Why views are clean to use but painful to change in Postgres, with a tour of how they work under the hood and what’s missing from ALTER VIEW. Surprisingly, the mechanism that would fix it already exists inside pg_dump…

Radim Marek